ID3D12PipelineLibrary LoadGraphicsPipeline internal driver error

Gaming and Visualization Technologies APIs DirectX, DXR, DirectCompute
1

Hi!
I have an issue with ID3D12PipelineLibrary->LoadGraphicsPipeline. It removes the device with DXGI_ERROR_DRIVER_INTERNAL_ERROR. Using DXIL under ExperimentalShaderModel.
GTX1080, Drivers 456.38, Win10 build 19041.508